639616400574 has 32 divisors (see below), whose sum is σ = 1312138064160. Its totient is φ = 207734784000.

The previous prime is 639616400557. The next prime is 639616400617. The reversal of 639616400574 is 475004616936.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1501377 + ... + 1879724.

It is an arithmetic number, because the mean of its divisors is an integer number (41004314505).

Almost surely, 2^639616400574 is an apocalyptic number.

639616400574 is an abundant number, since it is smaller than the sum of its proper divisors (672521663586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

639616400574 is a wasteful number, since it uses less digits than its factorization.

639616400574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381916.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 639616400574 in words is "six hundred thirty-nine billion, six hundred sixteen million, four hundred thousand, five hundred seventy-four".